Download Cretaceous Shelf Sandstones and Shelf Depositional PDF

ISBN-10: 087590629X

ISBN-13: 9780875906294

ISBN-10: 1118667158

ISBN-13: 9781118667156

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Published by means of the yank Geophysical Union as a part of the Field journey Guidebooks Series.

The moment subject matter specializes in higher Cretaceous coastal and shallow marine rocks as displayed by means of exposures within the striking publication Cliffs of Utah. The shelf and shoreface sequences obvious in those rocks characterize a few of the classical exposures of such facies within the usa. as a result of excessive charges of sediment yield from the close by actively uplifting Cretaceous Sevier orogenic belt, the Mesaverde staff within the e-book Cliffs is ruled by means of regressive sequences, punctuated by way of domestically broad unconformities.

Chapter 1 Deltaic and Lacustrine Facies of the fairway River Formation, Southern Uinta Basin, Utah (pages 1–11): Robert R. Remy
Chapter 2 Stratigraphy and Sedimentation of the publication Cliffs, Utah (pages 13–24): Rex D. Cole and James F. Friberg
Chapter three Coastal and Shallow Marine Cyclicity (pages 25–33): Robyn Wright, Danny Katzman, Melissa J. Montz and Robert S. Zech
Chapter four Depositional structures structure of Shallow Marine Sequences (pages 35–79): Dag Nummedal, Robyn Wright, Donald J. P. fast, Roderick W. Tillman and Niels R. Wolter

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Read Online or Download Cretaceous Shelf Sandstones and Shelf Depositional Sequences, Western Interior Basin, Utah, Colorado and New Mexico: Salt Lake City, Utah to Albuquerque, New Mexico June 30-July 7, 1989 PDF

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Extra info for Cretaceous Shelf Sandstones and Shelf Depositional Sequences, Western Interior Basin, Utah, Colorado and New Mexico: Salt Lake City, Utah to Albuquerque, New Mexico June 30-July 7, 1989

Example text

1984], Vail [1987], van Wagoner et al. [1987] and Haq et al. [1987]. For this type of analysis it is essential that we be as precise as possible in the use of terminology. For that reason, applicable stratigraphic terms will be briefly summarized. Also, herein we will discuss the relative importance of the physical parameters controlling the architecture (3-D arrangement) and lithology of deposi­ tional sequences. In general, this model follows the arguments of Vail [1987] and Christie-Blick et al.

3-3A). We should note that "order-terminology" in nearshore clastic deposits reflects only the hierarchical arrangement of these cycles. To date, no spectral analyses or refined radio­ metric dates confirm the actual duration of these couplets. Qualitative geometric estimates suggest, how­ ever, that 5th-order Point Lookout cycles fall easily within a duration range of 20 Ka to 100 Ka [Wright, 1984], which is in agreement with estimates of Punc­ tuated Aggradational Cycle (PAC) duration [Goodwin and Anderson, 1985].

A v e r a g e 3 % m u d in d i s r u p t e d l a m i n a e a n d m a t r i x . Lower Shoreface D o m i n a n t g r a i n s i z e : 1 7 5 fxm. M o d e r a t e l y w e l l sorted feldspathic sediment. Interbedded, low a n g l e H C S stratified a n d b i o t u r b a t e d b e d s ; b e d s f r o m 2 0 c m to 1 m thick, s c o u r e d a t b a s e . Dag Nummedal & Ivo Bergsohn June 27, 1987 LEGEND Planar x-beds \i* Burrows Tangential x-beds §1 Ophiomorpha Thalassinoides = Horizontal beds ^ Trough x-beds P Cylindrichnus Sigmoidal x-beds & Septarian concretions -U--U- Load casts i Graded beds ^ FIGURE 4-6 A.

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Cretaceous Shelf Sandstones and Shelf Depositional Sequences, Western Interior Basin, Utah, Colorado and New Mexico: Salt Lake City, Utah to Albuquerque, New Mexico June 30-July 7, 1989

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